*As I posted here <https://www.mkgmap.org.uk/pipermail/mkgmap-dev/2024q4/034350.html>on 2024.12.01, I was having issues with POIs not displaying labels for some garmin devices (specifically the XT2 and Tread) when generating /img files using mp file input to mkgmap. I did some exploration and discovered this (maybe well known but not by me):
** * Each device model displays POIs differently (i.e., type 0x100 does not show the same thing). There seems to be no consistency across models (Felix echoed this in a follow-up post). * Each model displays labels for each POI type differently (some show no label, others show small vs big text). There seems to be no consistency across models. * I attempted to use the custom "[_point]" feature of the mp files and mkgmap but the custom point bitmaps only work for some garmins. Even then, it didn't help with my missing [poi] labels. * Prior to the labels not working on the XT2 and Tread units, I always used the 0x1400 POI code type for my labels. With a lot of cross-model experimentation I discovered a single POI code (0x1E00) will display large text on all garmin models I was able to test with (Montana 6XX and 7XX, XT, XT2, Tread). I have no idea if this POI code will work with all garmins that support custom maps. Questions: * Are these issues with each model behaving differently with respect to POI types well-known? If so, how are they gotten around by (OSM) map builders? How can a single map be built that has POIs and labels that are consistent across more than one device. What am I missing? * How does OSM handle this? I presume that an OSM map generated for an area works on all garmin devices? I will admit that I don't know what the OSM map limitations are across garmin models. Does the JOSN model allow the devices POI maps to be loaded on a per-map basis? If I were to switch to JOSN model for mkgmap input, could I get around all the device limitations I am running into with the mp file format? Can someone recommend a good tutorial on getting up to speed on generating JOSN for simple map input to mkgmap? * OSM uses the JOSM model to feed mkgmap. Does that model allow for more flexibility and control than the "mp" input file model? I presume the MP file format is obsolete. * Is there any better documentation for the MPO format than the CGPSMAPPER pdf file floating around on the internet? * Can anyone recommend either a different website or people whom I may contact for further help with any of this? Any and all help is appreciated. *
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